Thermoluminescent dating gdansk
For both pieces: curve (a) is the TL emitted by a sample of powder taken from the object, curve (b) is a laboratory induced glow-curve curve (c) is the background.The ancient piece : (a) is way above the background (c), and approximately midway between background and (b) The modern piece : (a) is only just above the background (c) and way below (b) Porcelain and certain other types of clay cannot be tested using the fine-grain method. The TL reader is programmed to measure changes in the 110C peak of quartz (the pre-dose peak) in the clay.From these measurements we can calculate the age of the piece.
Sample discs are mounted on a wheel and the readers are programmed to run heating and irradiation sequences.
Chronologic evidence for multiple periods of loess deposition during the late Pleistocene in the Missouri and Mississippi River Valleys, U. Implications for the activity of the Laurentide Ice sheet, [w:] Nowiniec, stan.
2 wczesnośredniowieczne grodzisko na pograniczu śląsko-łużyckim w świetle badań interdyscyplinarnych, red.
The TL is measured using a sensitive detector called a photomultiplier tube.
The total amount of The samples are heated and the data appears as a graph of TL against temperature, called a glow-curve.